code: def load_js_src() -> str:
      return (_here / "js" / "index.js").read_text()
  
imports: import json
  import anywidget
  import traitlets
  import pathlib
  from typing import Any, Set, Optional
  import altair
  from altair.utils._vegafusion_data import using_vegafusion, compile_to_vegafusion_chart_state
  from altair import TopLevelSpec
  from altair.utils.selection import IndexSelection, PointSelection, IntervalSelection
label_desc: Use image node_id 1 for calling a global function with example usage: load_js_src() and returns: unknown